Bis-triazine compounds

ABSTRACT

Compounds of the formula   ARE DISCLOSED, WHEREIN R1, R2 and R3 are fluorinated or chlorofluorinated alkyl or ether or polyether groups. These compounds are thermally and oxidatively highly stable fluids, useful as hydraulic fluids in, e.g., aircraft.

United States Patent Schuman et a1.

1 1 June 10, 1975 BlS-TRlAZINE COMPOUNDS [75] Inventors: Paul D. Schuman, Hawthorne;

Eugene C. Stump, .lr., Gainesville, both of Fla.

{73] Assignee: PCR, Inc., Gainesville, Fla.

[22] Filed: Nov. 18, 1971 [21] App1.No.: 200,212

[52] US. Cl. 260/248 CS; 252/78 [51] Int. Cl C07d 55/50 [58] Field of Search 260/248 CS [56] References Cited UNITED STATES PATENTS 3,708,483 1/1973 Anderson et a1. 260/248 3,810,874 5/1974 Mitsch et a1. 260/78 $816,416 6/1974 Croft et a1. 260/248 3,845,051 10/1974 Zollinger 260/248 Primary Examiner-John M. Ford Attorney, Agent, or FirmCushman, Darby & Cushman [57] ABSTRACT Compounds of the formula 11 Claims, N0 Drawings BIS-TRIAZINE COMPOUNDS BACKGROUND OF THE INVENTION The copending application of Schuman et a1., Ser. No. 733,304, filed May 31, 1968 now US. Pat. No. 3,654,273, discloses the preparation of high molecular weight fluorinated alkylsubstituted monotriazines.

British Pat. No. 1,156,912 discloses the preparation of low molecular weight partially fluorinated alkylsubstituted bis-triazines.

SUMMARY OF THE INVENTION The present invention relates to fluorinated alkylsubstituted bis-triazines having relatively high molecular weights and a wide range of fluid properties which can be obtained through proper selection of various substituents. The perfluoroalkyl substituted bistriazines are of the formula:

(I R3 (W wherein R R and R are defined hereinbelow.

DESCRIPTION OF THE INVENTION (NI? R3 t Y OCF -C l 2 wherein R and R are independently selected from the group consisting of a. perfluorinated alkyl of 1 12 carbon atoms, wherein the alkyl group may be straight chain or branched chain, preferably of the formula C7! F( 211 +1) wherein n is a number from 1 13, such as perfluoromethyl, perfluoroisopropyl, perfluorobutyl, perfluorooctyl, perfluorododecyl and the like.

b. perhalogenated chlorofluoroalkyl of l l 1 carbon atoms, wherein the alkyl group may be straight chain or branched chain, preferably of the formula wherein m is a number from 0 5, such as, for instance, chlorodifluoromethyl, dichloropentafluoropropyl, and

the like.

c. Groups of the formula f5 T 1 1 R iO (|)-CF O p i1 wherein each R is independently F, C1, or perfluoroalkyl of 1 to 5 carbon atoms, and R R and R are independently F, Cl, perfluoroalkyl of l to 7 carbon atoms, m-hydroperfluoroalkyl of 2 to about 12 carbon atoms, such as w-hydroperfluoroethyl, m-hydroperfluorohexyl, and the like, or perhalogenated chlorofluoroalkyl of 1 to 7 carbon atoms, and p is a number from 1 to 20, such as and the like.

d. w-hydroperfluoroalkyl of 3 to about 13 carbon atoms, such as m-hydroperfluoropropyl, w-hydroperfluoroheptyl, or w-hydroperfluorotridecyl, and R is perfluoroalkylene of 2 to about 20 carbon atoms, perhalogenated chlorofluoroalkylene of 2 to about 20 carbon atoms, and mixtures thereof, wherein each R is independently F, Cl perhalogenated chlorofluoroalkyl of 1 to 5 carbon atoms, such as CF Cl, C1CF CFCl'-, and the like, or perfluoroalkyl of l 5 carbon atoms such as CF C F iso-C F and n C F x, y and z are independently numbers from 0 20 and n is a number from 2 20.

The "dumbbell" triazines of the present invention have distinct advantages over the materials produced by the prior art acknowledged above. The most significant advantages are that higher molecular weights may be obtained, thereby reducing volatility, which is a significant factor in certain lubrication applications. and the fact that a wide range of fluid properties can be obtained due to the increased number of possible substituents.

The bis-imidolyamidine is then subjected to a ring closure step by adding thereto an excess, generally about 50 percent or more of a fluorinated anhydridc of the formula or an acid fluoride of the formula R COF, according to the reaction scheme:

Compounds of the present invention are readily made through a ring closure process. A nitrile, which may be obtained by the method disclosed in the aforesaid U.S. Pat. No. 3,654,273 is reacted with an excess of ammonia to form an amidine, following the reaction scheme:

H CN NH3 9 H1O NH The reaction is preferably conducted at about the reflux temperature of ammonia and atmospheric pressure, although temperatures of 50 to +40C. may be used, and higher and lower pressures may be used, without, however, any significant advantage over atmospheric pressure. The fluorinated nitriles used as starting materials are produced by reaction of the corresponding fluorinated acyl fluorides with ammonia, followed by dehydration of the resulting amide with phosphorous pentoxide.

Excess ammonia is removed from the amidine produced above and then a stoichiometric amount of a dinitrile is reacted with the amidine to form a bisimidoylamidine following the general reaction scheme:

NH NHZ I NCR3CN R1 c This reaction is preferably conducted at room temperature and atmospheric pressure, although temperatures of to 50C. may be used. In addition, although not preferred, the pressure may be higher or lower than atmospheric. The dinitrile may be prepared according to the method of U.S. Pat. No. 3,317,484.

EXAMPLES OF THE INVENTION An excess of ammonia (approximately 20 ml) was condensed into a ml flask, equipped with a stirrer, addition funnel and dry-ice cooled condenser fitted with a CaSO drying tube. 19.5 g of the compound (0.02 moles) was then added dropwise to the flask. When the addition was complete, the condenser was NH NH NH? ll ll l CFCF removed and the contents of the flask were allowed to warm to room temperature. with boiling off of the excess ammonia. The flask was placed under reduced pressure to remove the last traces of unreacted ammonia from the product, an amidine. 4.2 g of dinitrile of the formula NC(CF OCFCIE (IO. 3 CF C F O CFCF O u CFCO? (0.06 moles) which had been stirred with 10 g of dry, powdered, sodium fluoride. The resulting mixture was then filtered and the filtrate was distilled to produce 26.2 g of the bis-triazine of the above formula, boiling at 245 265C./0.l mm pressure, in 61 percent yield. Redistillation produced 19.7 g of the triazine, boiling at 256 265C./0.l mm pressure. Analytical data from 5 the triazine is recorded in Table 1 below and physical properties of the triazine are set forth in Table 2 below.

EXAMPLES 2 11 Using the procedure of Example 1, but with the starting compound indicated in Table 1, other perfluorinated a,w-bis(2,4-dialkyl-s-triazinyl)alkanes were prepared. The physical properties of these triazines is set forth in Table 2. In Examples 2, 3, 5 and 7; the starting dinitirle was a mixture of isomers, having the indicated molar proportions of the respective isomers. In Example 6 and ll, a mixture of isomers again was used, wherein the mixture contained various compounds falling within the scope of the formulas set forth below.

TABLE 2 PHYSICAL PROPERTIES OF BIS-TRlAZlNES Example Viscosity cs ASTM Temp for Pour 100F l40F 2IOF Slope 3,000 cs Point F What is claimed is: 15 R is independently F, C], perfluoroalkyl of l 5 car- I. Compound of the formula: bon atoms, or perhalogenated chlorofluoroalkyl of l 5 carbon atoms, x and y are independently numbered from 0 20, z is a number from 1 to 20, n is a number N Y j; from 5 to 20, and n is a number from 2 20. 2. The compound as claimed in claim 1, wherein at 1i 3 f R least one of R and R are fluorinated alkyl of the formula N N N N n (2n +1) I l wherein n is a number from 1 13.

3. The compound as claimed in claim 1, wherein at 2 2 least one of R and R is a chlorofluoroalkyl of the formula wherein R and R are independently selected from the group consisting of I I a. perfluoroalkyl of l 12 carbon atoms, 91 r, b. perhalogenated chlorofluoroalkyl of l l 1 carbon v Q atoms, and c. radicals of the formula: i

R R R wherein m is a number from 0 5. i 4. Compound as claimed in claim 1, wherein R and R are R CO'(-TCF O) CII 2 u u 40 7 3 6 3 1 I? t wherein each R is independently selected from the 7 2 TF group consisting of F, C] and perfluoroalkyl of l to 5 carbon atoms, and R R and R are independently se lected from the group consisting of F, Cl, perfluoroand R3 is alkyl of 1 7 carbon atoms, w-hydroperfluoroalkyl of 2 to about 12 carbon atoms, perhalogenated chlorofluoroalkyl of 1 to 7 carbon atoms, and p is a number from 1 20, and w-hydroperfluoroalkyl of 3 to about C 3 l3 carbon atoms, and R is a member selected from the i group consisting of V perhalogenated chlorofluoroalkylene of 2 to about 5. Compound as claimed in claim 1, wherein R and 20 carbon atoms, and mixtures thereof, wherein each R are F 9. Compound as claimed in claim 1, wherein R, and 1 .7- R are C F O CF CF CF 2 and R is 5 CF F f C F O-( CF-CE -O CF- (CF O CFCF O F-- 10 and R is 6. Compound as claimed in claim 1, wherein R, and R, are CF CF CF l 3 (CF o CF-CF -O-CF- 4- W- CF 0 CL 10. Compound as claimed in claim 1, wherein R, and and R is R are CF 3 l 3 5 QC-" 9 3f-CE 0 c r .0- m c -0 -c:-

7. Compound as claimed in claim 1, wherein R and d R i R are CE c'- CF I 3 Y A i C F -OCF- 1 s n 3 7 CF 0 CF CI' OCF-C: -e.: and R315 11. Compound as claimed in claim 1, wherein R is CF CF CF 3 3 I 3 -(CF -O-CF- 1 2 1 C F O-( CPCF Q cr 8. Compound as claimed in claim 1, wherein R and 2 is R are 3 i 40 C F OCF- m C 1 C. CF 0 CF and R IS and R is F i 3 T 3 E CF Y 3 I 3 CF 5; o r c1- 0 or -(CF -O-CFCF -0-CF- 

1. A COMPOUND OF THE FORMULA:
 2. The compound as claimed in claim 1, wherein at least one of R1 and R2 are fluorinated alkyl of the formula CnF(2n 1) wherein n'' is a number from 1 -
 13. 3. The compound as claimed in claim 1, wherein at least one of R1 and R2 is a chlorofluoroalkyl of the formula
 4. Compound as claimed in claim 1, wherein R1 and R2 are
 5. Compound as claimed in claim 1, wherein R1 and R2 are
 6. Compound as claimed in claim 1, wherein R1 and R2 are
 7. Compound as claimed in claim 1, wherein R1 and R2 are
 8. Compound as claimed in claim 1, wherein R1 and R2 are
 9. Compound as claimed in claim 1, wherein R1 and R2 are
 10. Compound as claimed in claim 1, wherein R1 and R2 are
 11. Compound as claimed in claim 1, wherein R1 is 